Yeah, food pairings, who'd have thunk it?! Oh wait, every chef since the middle ages.
And no, veggies don't pair with fried foods. I'm betting that after fried chicken nuggets, and fried burgers, there's no nutrition left from the veggies that just slide right through.
Oh, the sequence you say? Right, like the antipasti course, the salad course, the appetizer course.
And, this is just my observation, tell me if you've heard this before, you don't want your burger to get cold, so you'll eat it while it's hot. Then you've got cold veggies, which are decidedly less appealing.
So, let's summarize: children, aka hungry hungry humans, forced to eat an entire meal in a single plate, choose to eat the hot entree, aka the most nutrient-filled, food, first, and then may not remain hungry for something that should have been eaten long before.
And we're surprised? We're surprised that a one-plate one-course meal isn't fully balanced? That's why the nuggets ought to have been served with a tangy marinara dipping sauce, wherein three servings of veggies could have been blitzed.